Sprinkler head



June 17, 1930.

SPRINKLER HEAD Filed 001:. 2, 1928 JTLoizn'mn J. c. LOHMAN J 1,764,570

Patented June 17, 1939 UNITED sr -Tss PATENT OFFICE JOHN CUR'I. LOHMAN, 015 DETROIT, MICHIGAN srnmxmn HEAD Application and October 2, 1928. Serial No. 309,704. 2

This invention relates to a sprinkler device and pertains particularly to an' improved type of sprinkler head. j

The primary object of the present invention is to provide an automatically Operating sprinkler head designedto be'u'sed either in association with underground sprinkler systerms or upon a suitable movable base.

Another object of the invention is to pro scription taken in connection with the accompanying drawin forming part of this specifloat-ion, with t e understanding, however claims.

that the invention is not confined to any strict conformity with the showing of the drawing but may be changed or me ified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended In the drawing Figure 1 is a vertical sectional view of the sprinkler head embodyin the present invention showingone form 0 diffuser associated therewith Figure 2 is a view similar to Figure'l showing the diffuser seated in the head;

Figure'3 is a top plan view of the whirling diffuser; I

Figure 4 isan elevational view of a modified form of water diffuser;

Figure 5 is a side elevational view of a further modification, and

Figure 6 is a top plan view of the diffuser of the type shown in Figure 5. I

Referring tothe drawing in detail, the nuineral 1 indicates generally a casing which i constitutes the htaulln-oper of the sprinkler,

this head being open at one end as indicated removed for at 2, the opposite end being reduced as indicated at 3 and provided with interior threads 4 to facilitate attaching the head to a su ply pipe. The larger or upper end .of the cad 1 is exteriorly threaded as indicated at 5 to receive anflanged cap 6 through the center ofwhich -a-relatively large aperture 7 is formed. This cap 6 has interposed between it Y and the top edge of the head 1 a suitable washer 8 against which a portion of the water difiusing unit hereinafter described,'abuts' when it is forced ing...

In Figure 1 one type of diffusing unit is shown which comprises an annular plate 9 designed to snugly fit within the head 1 for vertical reciprocatory movement therein.

- This plate is provided with a centrally threaded opening 10 surrounded by a series of equi-distantly spaced relatively small apertures l1.

Designed to be mounted upon the plate 9 is an inverted frusto-conical body 12, the

to the upper part of the caspivoted surface 13 of which is provided with a series of longitudinally and spirally extending flutes 14. The area of that portion of the'body 12 abutting the plate 9 is smaller than the area defined by the annular series of apertures 11 so that streams of water passing upwardly through the apertures 11 will be directed against the inclined surface 13 of the body 12 and would pass upwardly therealong along the flutes '14 acting. to rotate the body about the pin 15 which passes longitudinally therethrough and engages-at its lower end 16 in the threaded central opening 10 of the plate 9.

The circumference of the top portion of the body 12 is such as to permit the ody to snugly fit in the opening 7 of the casing cap 6, thus after a stream of water which has been opened into the casing head 1 and which has forced the plate 9 upwardly to the top of the casingin'the manner shown, has been cut off,

the plate 9 and the body 12 will drop until the plate reaches the bottom portion of the head, whereupon the upper edge of the body 12 will snugly fit within the opening 7 and close the same against the entrance of foreign matter.

-conical design and arranged in inverted poedge. of the disk to move in a suitable slot 17' iormed in the inner wall surface of the casing ead.

In Figure 4;, iriodifiedform of the unit 12 is shown and indicated by the numeral 18. In this form ,the unit is of substantially frustosition upon-the plate 9, the lower portion thereof having a threaded pin 19 projecting therefrom for engagement in the threaded aperture 10 of the plate. Thesurface ofthe wall of the unit 18 is concave as indicated at 20 and is smooth throughout so that when water is injected into the head and the plate 9 carrying the unit is forced upwardly the water escaping through the aperturesll will flow over the smooth convex'ed surface to this unit and beprojiected in a smooth circular sheet. v

In Figures 5 and 6, a still further modification of the units described to be mounted upon the plate 9 is shown, this modification being indicated by the numeral 21. In this form a semi-cylindrical body 22 has formedupon the flat side thereof an inverted halfcone 23, the wall of which is concave like the wall of the cone 18.,

y A special form of plate 24 is provided to carry the half cone structure 23, this special plate having a single water outlet aperture formedtherethrough as at 25 which is located todischarge against the concavevvunder surface of the half cone carried by the late, in the manner shown. In order to lig ten the construction of this unit, the plate and semicylindrical portion 22 is provided with a bore 26 extending from the under side of the plate upwardly. A pin 27 is also carried by the" plate 24 upon its periphery for engagement in the slot 17' of the casing wall to prevent the unit from rotating.

The unit 21 is designed for use in sprinkling shrubs or plants where it is desirable that the water be directed in one direction only and, as it will bereadily seen, with this unit,

' a half circular smooth sheet of water will be ejected from the device over the selected area.

From the foregoing description, it will be Having thus described my invention, what I claim is 1. A sprinkler head of the character de- A "within the casing head, and water spreading means pivotally mounted on plate.

2. A sprinkler head of the character described comprising a casing head having an open top and a threaded open bottom, a flanged cap carried by said head at its outer end, a gasket interposed between the cap and the outer end of the casing head, an apertured plate slidably mounted in said casing head, said plate being adapted to engage said gasket when forced upwardly wherebyto close the open top' of said casing head water said apertured tight, and an inverted frusto -conical water- 'spreading body mounted on said plate.

3. A sprinkler head vof the character de-. scribed comprisng a casing head, an apertured plate slidably mounted in said casing head, a flanged cap on the outer-end of said casing head adapted to retain the plate within the casing head when it is forced upwardly, means interposed between the cap and the outer end of the casing head to prevent leakage of water about the inner edge of the flanged cap, a water spreading unit pivotally mounted on the plate, and a face plate carried by said water s reading unit wherebyto protect the pivot rom dirt.

In testimony whereof I hereunto aflix my signature. 1

JOHN CURT LOHMANL readily appfeciated that with a sprinkler I head of the-character herein described, a whirling spray or solid sheet of water may be employed as desired without trouble for the cap 6 may be readily removed to replace one unit with another. It will also be apparent that if one unit is used frequently it may be lifted in position and after the supply of water is cut oil from the head, it will gravitate downwardly thereinto and close the outlet opening through the cap of the head, thus completely protecting the interior there- 5 of until further use of the device is desired. 1 

